MPU-32 Series - Motor Protection Unit

MPU_32_PG6_200
The MPU-32 Motor Protection Unit is used to provide current and temperature-based protection, metering, and data logging for three-phase low-voltage medium-horsepower induction motors. This relay is ideal for retrofitting and upgrading obsolete or aging motor protection using existing CTs. See the PMA Family of Panel Mount Adapter Kits to replace common obsolete relays.

FEATURES

IEEE #

BENEFITS

Overload

49, 51

Extends motor life and prevents insulation failures and fires

Dynamic thermal model

Provides protection through starting, running, and cooling cycles

Communications

Remotely view measured values and event records, reset trips, and access setpoints

Reduced overcurrent mode


Minimizes arc-flash hazards during maintenance to meet NEC 240,87 (B) (3)

Ground fault

50G/N, 51G/N

Prevents catastrophic failures and fires

Current unbalance/
Phase loss/Phase reverse

46

Prevents overheating due to unbalanced phases

RTD temperature

38, 49

RTD temperature protection (MPS-RTD module) for high-ambient or loss-of-ventilation protection

Phase loss/Phase reverse (current)

46

Detects unhealthy supply conditions

Overcurrent

50, 51

Prevents catastrophic failures and fires; extends motor life

Jam

Prevents motor damage by detecting mechanical jams or excessive loading

Undercurrent

37

Detects low level or no-load conditions

PTC overtemperature

49

Overtemperature (PTC) protection for high-ambient or loss-of-ventilation detection

Starts per hour

66

Limits the motor starts per hour to prevent overheating

Differential

87

Optional MPS-DIF module for sensitive winding-fault protection

Metering

View measured and calculated parameters with on-board display

MPU-CIM

Separate current input module to reduce risk of open-CT hazard and for convenient installation

Analog output

Provides means for metering selectable parameters

Data logging

On-board 100-event recorder for data logging

Conformal coating

Internal circuits are conformally coated to protect against corrosion and moisture

Access specifications, certifications, check availability and order parts below

Catalog #Supply
Voltage
(VAC)
Supply
Voltage
(VDC)
Relay
Contacts
ApprovalsAnalog Output (mA)CommsCompare
MPU-32-00-0065 - 26580 - 275Three Form C (N.O./N.C.)UL; CSA; C-Tick; CE4-20RS/TIA-232
MPU-32-00-0165 - 26580 - 275Three Form C (N.O./N.C.)UL; CSA; C-Tick; CE4-20RS/TIA-232
MPU-32-01-0065 - 26580 - 275Three Form C (N.O./N.C.)UL; CSA; C-Tick; CE4-20RS/TIA-232
RS/TIA-485
MPU-32-01-0165 - 26580 - 275Three Form C (N.O./N.C.)UL; CSA; C-Tick; CE4-20RS/TIA-232
RS/TIA-485
MPU-32-02-0065 - 26580 - 275Three Form C (N.O./N.C.)UL; CSA; C-Tick; CE4-20RS/TIA-232
DeviceNet
MPU-32-02-0165 - 26580 - 275Three Form C (N.O./N.C.)UL; CSA; C-Tick; CE4-20RS/TIA-232
DeviceNet
MPU-32-04-0065 - 26580 - 275Three Form C (N.O./N.C.)UL; CSA; C-Tick; CE4-20RS/TIA-232
Ethernet
MPU-32-04-0165 - 26580 - 275Three Form C (N.O./N.C.)UL; CSA; C-Tick; CE4-20RS/TIA-232
Ethernet
MPU-32-SMK

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